OP97 Precision Op-Amp

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OP97FP is an industry-standard, frequency compensated high precision operational amplifier. The IC is always available in an 8 – pin hermetically sealed dual inline IC package (DIP). OP97FP has a wide range of working conditions, a wide array of operating voltages, and is compatible with almost every TTL, CMOS, & PMOS device. The IC also offers many different features such as high input impedance and high noise immunity.

Precision Operational Amplifier

A Precision operational amplifier is an operational amplifier with better design specifications and topology than the conventional op-amp. Precision Op-amps are more accurate than your average general-purpose op-amps. In terms of design topology, Precision amplifiers have a better precision offset, zero-drift over time, lower internal noise (nV/√Hz), and input bias current. On the component scale, they have precise matching resistors etched in the substrate at the chip level.

For Example; a LM741 op-amp, has an offset voltage of 5mV. The offset voltage signifies the voltage that the user has to apply between the +ve and -ve of the IC, in order to get an output of 0V. On configuring the op-amp to operate at a gain of 100. The gain will not only multiply the input signal, but it will also multiply the offset voltage. This will result in the output voltage being off-value by a factor of +/-0.5V. On considering the OP177; a precision op-amp, with an offset voltage of 25uV. The same gain value of 100, would produce an error of only 2.5mV in a signal that has been amplified by a factor of 100.

OP97 Pinout

OP97 Pin Configuration

Pin No	Pin Name	Description
1	NULL	Null Pin
2	INV-INPUT	Inverting Input Pin
3	NON-INV-INPUT	Non Inverting Input Pin
4	V-	Negative Power Supply
5	OVER COMP	Over Compensation Pin
6	OUT	Output Pin
7	V+	Positive Power Supply Pin
8	NULL	Null Pin

OP97 Features

Low supply current: 600 μA maximum
OP07 type performance
Offset voltage: 20 μV maximum
Offset voltage drift: 0.6 μV/°C maximum
Very low bias current
25°C: 100 pA maximum
−55°C to +125°C: 250 pA maximum
High common-mode rejection: 114 dB minimum
Extended industrial temperature range: −40°C to +85°C

Application

The OP97 is a low-power alternative to the industry-standard precision op-amp, the OP07. The OP97 can be substituted directly into OP07, OP77, AD725, and PM1012 sockets with improved performance and/or less power dissipation and can be inserted into sockets conforming to the 741 pinout if nulling circuitry is not used. Generally, nulling circuitry used with earlier generation amplifiers is rendered superfluous by the extremely low offset voltage of the OP97 and can be removed without compromising circuit performance. Extremely low bias current over the full military temperature range makes the OP97 attractive for use in sample-and-hold amplifiers, peak detectors, and log amplifiers that must operate over a wide temperature range. Balancing input resistances is not necessary with the OP97. Offset voltage and TCVOS are degraded only minimally by high source resistance, even when unbalanced.